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    ① by the window lost in thought for a long time, I realized that no scene in the world . ② to give up smoking, he threw away his r cigarettes. ③In an emergency, you should . 【查看更多】

     

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           by the window lost in thought for a long time, I realized that no scene in the world remains        .

    A．Stand; unchanged                  B．To stand; unchanging

    C．Standing; unchanged              D．Stood; unchanging

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